Intuitively, geometric nonlinear effects should be significant if the deformed shape of the structure appears
distinctive from the original geometry without amplifying the displacements. There is no distinct limit for large
displacements because geometric nonlinear effects are related to the dimensions of the structure and the boundary
conditions. When the deformations are "large" compared to the dimensions of the structure or in other words the initial geometry of the structure has changed to an extent such that its effect on the stiffness cannot be ignored we will consider large displacement or geometric nonlinearity (PARAM,LGDISP > 1).
